Received: by 2002:a25:ef43:0:0:0:0:0 with SMTP id w3csp685539ybm; Fri, 29 May 2020 09:41:46 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwOrprOLq7VuUP9HapCqsXtzTjv10jcoFRPgcQRoODFHs4DjD2AxlP3hdQDqO6f4SI7DINm X-Received: by 2002:a50:d556:: with SMTP id f22mr9477361edj.307.1590770505976; Fri, 29 May 2020 09:41:45 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1590770505; cv=none; d=google.com; s=arc-20160816; b=bPR/PwIomGp4QrOiAZ5LNhK3ZOnIAdZZfJDpcPCRdl1Vj5TbhUAcqf5D+jOE/EpqyP TFAE6NLKyhTwdCodD++jbqxiK3pOpfvQoTtjXWPnB07wfrPGwT1/UzOgZBiy8spwfVlU E70Zu2xz5kkP5cyDKoLp04AiyhPClX0mLb5CCwVQVEneMxRwPeNp38cCrvsBF/rEUrdW 3d9SakSrTWbY+NrTHXagAixj9K8neHzPR0+UxfYgubk6Ip8sgpAU9V/4pO670Qa4+3Kp VUOCgnF1OaZ/78afndp+9INsPmZMhNeW87jrF0QH23AAukA7C4q7hxdE0Ex2tiTfVfji Qluw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:in-reply-to:content-transfer-encoding :content-disposition:mime-version:references:message-id:subject:cc :to:from:date; bh=WmYYiouhDMhsyTBIBo+IkT1vsR+7qyGbswjmcejQyMw=; b=FNwksZSGd7FTLk8j1I8tdMXNbfGDorIYloCAtu+iGIOF6vkPBgIUTYswA3jmOiEO86 KlXOa0oLL34t+Llaxjd3uSmxTXpCqvhVrPAzGmb/buU1u2MMGlPG9Hcf0tu9H2oB20kx 728cPdyimvoeDjbr5uW/clwSAwxG6jgE3wpKLh3apsp9BiDTQora+EACu0m/LiqiPFcJ FHLz8T9EXOeApFoAC/ahaehKm07XhAohi7rDrhPJnt1ogqElC0IqpKwdOkK+ieC0Axv9 fagXCzzKJ61PBPNq7ioJDpEsaik8MKTU+d2ifLGFdZR8ITUDnN+S+yo/PnMB87l/nyc6 wF2Q== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id d22si5756802ejj.389.2020.05.29.09.41.21; Fri, 29 May 2020 09:41:45 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726829AbgE2QhZ convert rfc822-to-8bit (ORCPT + 99 others); Fri, 29 May 2020 12:37:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60612 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725795AbgE2QhZ (ORCPT ); Fri, 29 May 2020 12:37:25 -0400 Received: from Galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 52519C03E969; Fri, 29 May 2020 09:37:25 -0700 (PDT) Received: from bigeasy by Galois.linutronix.de with local (Exim 4.80) (envelope-from ) id 1jei0Y-0001Bu-Mc; Fri, 29 May 2020 18:37:22 +0200 Date: Fri, 29 May 2020 18:37:22 +0200 From: Sebastian Andrzej Siewior To: Mark Marshall Cc: linux-rt-users , Mark Marshall , thomas.graziadei@omicronenergy.com, Thomas Gleixner , linux-kernel@vger.kernel.org, rostedt@goodmis.org Subject: Re: Kernel crash due to memory corruption with v5.4.26-rt17 and PowerPC e500 Message-ID: <20200529163722.mdxzrj4n3lyzjtfu@linutronix.de> References: <20200529131452.pgj7mx7xaz7n4kz3@linutronix.de> <20200529161518.svpxhkeljafbtdz2@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8BIT In-Reply-To: <20200529161518.svpxhkeljafbtdz2@linutronix.de> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2020-05-29 18:15:18 [+0200], To Mark Marshall wrote: > In order to get it back into the RT queue I need to understand why it is > required. What exactly is it fixing. Let me stare at for a littleā€¦ it used to be local_irq_disable() which then became preempt_disable() local_irq_disable() due to ARM's limitation. > > Best regards, > > Mark > Sebastian